If you want to discuss Global Warming, there is a thread in the Politics Section. There are links to articles and research that might help you make a decision as to what to worry about.
http://www.tfproject.org/tfp/showthread.php?t=84075
I am not trying to be a jerk and tell people what to do. I am just throwing this out there for people who don't check out the Politics thread. If you want to discuss it here, by all means, go ahead.
Just a heads up.